Involucrums

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Involucrum \In`vo*lu"crum\, n.; pl. L. {Involucra}, E.
     {Involucrums}. [L. See {Involucre}.]
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     1. (Bot.) See {Involucre}.
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     2. (Zool.) A sheath which surrounds the base of the lasso
        cells in the {Siphonophora}.
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